minor #54785 Remove calls to TestCase::iniSet() and calls to deprecated methods of MockBuilder (alexandre-daubois)

This PR was merged into the 5.4 branch.

Discussion
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Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Last round (before new deprecations 🙂). All deprecations [listed here](https://github.com/sebastianbergmann/phpunit/blob/main/DEPRECATIONS.md) should be gone.

Commits
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4d5065ddd9 Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`

Author: xabbuh

Tests/Firewall/ContextListenerTest.php

@@ -366,8 +366,11 @@ public function testWithPreviousNotStartedSession()
 
     public function testSessionIsNotReported()
     {
-        $usageReporter = $this->getMockBuilder(\stdClass::class)->addMethods(['__invoke'])->getMock();
-        $usageReporter->expects($this->never())->method('__invoke');
+        $this->expectNotToPerformAssertions();
+
+        $usageReporter = static function (): void {
+            throw new \LogicException('This should not be called');
+        };
 
         $session = new Session(new MockArraySessionStorage(), null, null, $usageReporter);